11855117424 has 80 divisors (see below), whose sum is σ = 32020164864. Its totient is φ = 3772454400.

The previous prime is 11855117419. The next prime is 11855117509. The reversal of 11855117424 is 42471155811.

It is a happy number.

11855117424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564879 + ... + 585489.

Almost surely, 2^11855117424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11855117424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16010082432).

11855117424 is an abundant number, since it is smaller than the sum of its proper divisors (20165047440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11855117424 is a wasteful number, since it uses less digits than its factorization.

11855117424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21166 (or 21160 counting only the distinct ones).

The product of its digits is 44800, while the sum is 39.

The spelling of 11855117424 in words is "eleven billion, eight hundred fifty-five million, one hundred seventeen thousand, four hundred twenty-four".